for循环中接口调用

  
//模拟ajax请求
function ajax(){
    let data = [{name:‘小明‘,age:22},{name:‘小红‘,age:18}]
    return new Promise((resolve,reject)=>{
      setTimeout(()=>{
          resolve(data)
      },200)
    })
  }

//因业务要求,循环中调用接口
  function run(){
     let userList = [{id:1},{id:2}];
     let list = [];
     userList.forEach((item)=>{
        ajax().then((res)=>{
          list.push(res)
        })
    })

    console.log(list)
  }

  run()

  function ajax() {
    let data = [{ name: ‘小明‘, age: 22 }, { name: ‘小红‘, age: 18 }]
    return new Promise((resolve, reject) => {
      setTimeout(() => {
        resolve(data)
      }, 200)
    })
  }
  创建Promise方法
  function createPromise() {
    let promise = new Promise((resolve, reject) => {
　　　　//将业务接口的返回值,resolve进去
      ajax().then((res) => {
        resolve(res)
      })
    })
    return promise
  }


  function run() {
    let userList = [{ id: 1 }, { id: 2 }];
    let list = [];
    let resList = [];
    userList.forEach((item) => {
      list.push(createPromise())
    })
    Promise.all(list).then((res) => {
      resList = res
    })
  }


  run()

  function ajax() {
    let data = [{ name: ‘小明‘, age: 22 }, { name: ‘小红‘, age: 18 }]
    return new Promise((resolve, reject) => {
      setTimeout(() => {
        resolve(data)
      }, 200)
    })
  }

　递归终止条件,数组长度小于
  async function run(length, arr) {
    const res = await ajax();
    arr.push(res)
    if (length> 1) {
      await run(length- 1, arr)
    }
    return arr
  }


  async function getResult() {
    let userList = [{ id: 1 }, { id: 2 }];
    let res = await run(userList.length, []);
  }

  getResult()